Multiple-condenser water-still.



PATENTED FEB. 11, 1908.

J. A. POWER.

MULTIPLE CONDENSER WATER STILL.

OVERFLOW APPLIUATION FILED FEB.16, 1907.

FRUM BOILER TO WASTE.

C m i BOILER FROM BO/LERfl T0 BOILER attorney;

UNITED STATES PATENT oFFIoE.

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MUTIPLE-CONDENSER WATER-STILL.

Specification of Letters Patent.

Patented Feb. 1 1,1908.

Application filed February 16, 1907. Serial No 357,661-

provide a still which will operate oontinu-.

ously, as the water, when boiled away, is replenished automatically, While the boiling of the water is accomplished by an uninter rupted and continuous'flow of steam through a heating coil.

Further objects are to provide-a compact,

serviceable, durable and economical still of the type mentioned.

A further and very important object is to provide a maximum area of condensing suriaces, or in other words, to utilize the maximum cooling and condensing capacity of the cold water supply chamber or reservoir.

In order that my invention may be fully understood, I will now proceed to describe it with reference to a desirable form shown in the accompanying drawings, which,

Figure 1 is a side elevation of the lower part of my improved water still. Fig. 2' is a vertical central section of my improved still. l ig. Sis a top view of the still; the dome beand in in omitted.

il l surrounding the wall thereol Surmounting this evaporator e is a cylindrical sl'rellf, in the lower pazrtof which is supported a double walled conical bottom g fromthe center of which projects a short upright extension g providing a discharge mouth g t for the steam passing from the evaporator c.

The upper portion of the double walled conical bottom 9 and the adjacent part of the shell f form a distilled water reservoir h, and the double walled conical bottom g, prolower part of the shell f and. controlled mg the water in the reservoir in at a lower I yides adead air space which serves for kee'ptemperature than a single walledconical bottom.

9 is a pipe located in the air space between the walls -of' the conical bottom g, havin its lower end projecting through the shell. and its upper end projectin throu h the closed tsp of said air space an into t e shell f so as to admit air into the interior of the latter, from the exterior of the still. A

faucet 1' enables the distilled water to be drawn from the distilled water reservoir h.

Located above the distilled water reservoir h the shell f is provided with a dished lower head is, surrounding the upright extension g! and closing the bottom of a cold water chamor n.

Z is an inner central upwardly tapering tube or uptake extending through the lower head 7c and receiving, the upright extension g of the conical bottom g and projecting upwardly through a dished upper head We closing the top of the cold water chamber n, the shell the lower head k, the upper head m, an the central upwardly tapering tube or uptake Z formin the cold water chamber at, which is supplied with cold water by means of a supply pipe 0-, enterinithe valve 0.' y

An overflow pipe p leads from the top of the water chamber n, prefierably from that side 0 posite the supply-pipe 0, downwardly to an lntothe lower part of the evaporator cto continuously supply to the eva orator teed water which has been already eated. Pipe .pis controlled by valve 19 The waste pipe q leads from the pipe p near the top of the evaporator. Valves 1' and s'a-re used in cleaning out the still, valve 7' controlling a branch pipe 1" leading from the lower part of the reservoir to the overflow pipe- 1), and valve 8 being at the bottom of the evaporator e. A gage glass e see Fig. 1 indicates the height of the waterin. the evaporator e. The dome t of the still is ofi conical shape,

and is pierced centrally by a flue t, from' which issue the; volatile and empyreu-matic es from the still. An a ertured and r ished bathe-plate v is locate at the inner the cold water chamber or water-jacket n and discharges the distilled water into the distilled-water reservoir h. The downtake w preferably tapers from its upper to. its

' When cold water is admitted through pipe 0 to the water chamber or water-'acket n, the still is ready for operation. he cold water flows upwardly in and fills the water chamber n, and overflows therefrom through pipe 1), and passes into the evaporator e,

and when the gage glass a shows that the evaporator is nearly full, the valves 0,

are turned half off. Steam is now slowly turned on. The steam from 'the boiler returning to it after use, although partially condensed by losing some of its heat to the water in the evaporator, insures economy in coal consumption, as the steam flows continuousl from the boiler through the coil d and bac to the boiler, there being, aside from the heat extracted from the COIllIl the evaporator, but a slight loss from radiation.

vThe water in the evaporator becomes heated by the steam coil d and boils, and the steam generated in the evaporator rises through the mouth 9 into the uptake 1, where the long-run condensing surface furnished by the water-cooled wall of the uptake acts to condense a portion of the steam which trickles down the said surface and flows into the distilled-water resevoir h. The uncondensed steam passes u and out of the uptake and strikes the aflie-plate '0, which deflects it downwardly into the downtakes 10, whose long-run condensing surfaces condense the steam, which fiows in-streams of distilled water from the lower ends of the downtakes into the distilled-water reservoir h. The small cross section of the downtakes at their lower end gives more space in the cold water chamber n for the cold water, which first flows into'the lower end thereof, thus utilizing to the full extent the cooling efiect of the water in chamber n upon the water in the distilled-water reservoir. The water inlet 0 allows the water, as it becomes warm in the water chamber n, to flow upwardly, the steam in the downtakes w passing downwardly in a counter-current and is thus bound to be condensed before it passes the level of the coldest water and issues from the contracted ends of the downtakes into the distilled-water reservoir. The largest possible quantity of cold water is needed to cool ta es.

boiler, a she the condensing surface at the lower end of the uptake Z where the temperature'is at about' It will be seen that the uptake the highest. Z and the downtakes to decrease in size in the direction of movement of the steam, and that the greatest amount of condensing surface is provided at the top of the still, which is at a point intermediate the line of discharge of the steam that is condensed, at a point where the water of highest temperature 1s resent, in its passage by way of the down- The described arrangement of uptake and dow=ntakes also brings the center of gravity of the still, when full of water, nearer to the point of support, so that the still is not top-heavy. An advantage of the downward taper of downtakes w is that in the case of distilling water containing -much foreign matter or mineral particles, as lime, the latter will not tend to deposit on the outside of the. downtakes.-

The still is built on such scientific principles that, after having been once put in operation, it requires no further attention, as the water is replenished continuously.

The evaporator is kept fulland the surplus escapes through pipe 9 in case the 'ebullition is not violent. enough to produce steam as fast as the heated feed-water flows into the evaporator. By maintaining the water level in t e evaporator at a point above the coil (1 so as to, submerge it, the utilization of all the. heat-units is fully accomplished. The installation may be made by any steamfitter or plumber in a very short time, only three connections being necessary, first the connection of the two steam pipes and the still, and then the connection of the water supply pipelto the main.

Havin thus described my invention, and without 'miting myself to details, what I claim as new and of my invention is: 1. A water still comprising an evaporator, a steam coil located in the evaporator, pipes for connectin the steam coil with a steam surmounting the evaporator, having a lower head spaced from the evaporator and an upper head, and providing a coldwater chamber, a domelocated above the shell, providing a distilled water chamber,

and having an upright extension projecting through the lower head into the shell, an upwardly ta ering central uptake surroundingthe uprig t extension and connecting the distilled water chamber with the upper chamber, the downwardly tapering downtakes between the shell and the central uptake, and connecting the upper chamber with the distilled water chamber, a cold water supply pipe connected with the lower end of the cold water chamber, an overflow pipe, connecting theupper end of the cold the upper head (providing an upper chamber,

a doublewalle' conical bottom located between the evaporator and the lower head oi the shell, providing a distilled water chamber, and having an upright extension projecting through the lower head into the shell, an air pipe extendingh between the walls of the shell, through t e double conical bottom and its extension and thereabove, an upwardly tapering central uptake surrounding theupright extension and connecting the d1st1lled water chamber with the upper chamber, the downwardly tapering downtakes between the shell and the central uptake, and connecting the upper chamber with the distilled water chamber, a cold water supp] con-' nected with the lower end of the co water chamber, an overflow pipe, connecting the u per-end of the cold water chamber with t e evaporator, and a waste pipe connected with the overflow pipe near the top of the evaporator.

3. A water still comprising an evaporator, a steam coil located in the evaporator, pipes for connecting the steam coil with a steam boiler, a shell surmountin the evaporator, having a lower dished hea spaced from the evaporator, and an upper dished head, and roviding a cold water chamber, a dome ocated above the upper dished head providing an upper, chamber, a double walled conical bottom located between the evaplorator and the lower'dished head of the she roviding a distilled water chamber, and aving an upright extension projectin through the lower-dished head into the she an n wardly tapering central uptake surroun ing the upright extensionand connecting the distilled water chamber with the upper chamber, the downwardly taperin downtakes between the shell and the centra uptake, and connecting the upper chamber with the distilled water chamber, a cold Water supply pipe connected with the lower end of the cold water chamber, an overflow pipe, connecting the upper end of the cold water chamber with the evaporator, and 'a waste 1pipe connected with the overflow pipe near t e top of the evaporator.

4. A water-still comprising an evaporator, a steam coil located in the evaporator, pipes for connecting the steam coil with a steam boiler, a shell surmount the evaporator, having a lower head space from the evapo+ rator, and an upper head, and providing acold water chamber, a dome located above the upper head providing an upper chamber, a central flue extend" v throng the dome, an apertured dishedba e platelocated in the upper chamber between the upper head and the dome, 'a double walled conical bottom located between the eva orator and the lower head'of the shell, provi ing a distilled water chamber, and havi an upr' ht extension prof'ecting throu h t e lower ead into, the she I, an upwar y ta ering central u take surrounding the uprig t extension an convnectingthe distilled water chamber with the upper chamber, the downwardly tapering downtakes between the shell and the centra uptake, and connecting the upper chamber with the distilled water chamber, a cold water supply pipe connected with the lower end of the cold water chamber, an overflow pipe, connecting the u per end of the cold water chamber, with t e evaporator, and a waste pipe connected with the overflow pipe near the top of the evaporator.

5. A water still comprising an-evaporator,

a steam coil located in the evaporator, pipes for connectin the steam coil with a steam boiler, a she surmounting the evaporator,

having a lower head spaced from the evaporator, and an up erhead, and providing a' cold water cham er, a dome located above the upper head providin an upper chamber,

escape pipes extending om t- 6 coldwater chamber, throu h the up er head,'through the up or chanfleer and tlrirough the dome a den le walled conical bottom located between the evaporator, and the lower head of the shell, provlding a distilled water chamher, and having an upri ht extension rojecting through the lower head into the s ell,

' an n wardly tapering central uptake surroun in the upright extension and connecting the distilled water chamber with the upper chamber, the downwardly tapering downtakes between the shell and the central u take, connecting the upper chamber with t e distilled water chamber, a cold water supply pi econnected with the lower end of the co d water chamber, an overflow pi e, connecting the up or end of the col water chamber with the'evap'orator, and a waste pipe connected with the overflow pipe near the top of the eva orator.

Signed at New ork, N. Y. this 10" day of January 1907.

JOHN A. POWER. Witnesses: 4 Erin. H. FRANK, Jr., Geo. L. WHEnLooK.- 

